Yamaha F225A Service Manual page 19

Low-pressure fuel pump
The F225 has adopted a newly developed, low-pressure electrical fuel pump, in place of the low-
pressure mechanical fuel pump used in the previous electronic fuel injection system. With the adop-
tion of the electric pump, the routing of the fuel system has been made more compact. To prevent
the over-pumping of fuel, this pump operates for 10 seconds, and stops for 20 seconds when the
engine is operating at low speeds.
The pump operates constantly if the engine speed is 1,200 r/min or higher, or for several seconds
(which vary by ambient temperature) after the engine is started. At other times, it operates for 10
seconds, and stops for 20 seconds to prevent over-pumping.
1 Vapor separator
2 Low-pressure fuel pump
3 Fuel filter
4 On
69J3D11
Features and benefits
5 Off
6 10 seconds
7 20 seconds
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